Yes, I followed the guide.
Yes, I have tried 2 different ROMs: Quadra and Performa, that both work with Basillisk on Windows and Mac OS.
No, Basillisk was never setup on this machine before.
1. Before you start, make sure SDL2 version 2.0.14 or later is installed: https://www.libsdl.org/download-2.0.php
(For Linux, contact your distribution maintainer for updates.)